[Linux-cluster] Fencing agents

[Adam Manthei]

On Wed, Aug 03, 2005 at 11:40:14AM -0500, JACOB_LIBERMAN at Dell.com wrote:
> The 1855 has a built in ERA controller. You can modify the fencing agents to either send "racadm serveraction powercycle" or install the PERL telent module and create your own fencing script. The former option requires that the rac management software be installed on the host. I havent tested this with the 1855 btw.
> 
> http://sources.redhat.com/cgi-bin/cvsweb.cgi/cluster/fence/agents/drac/?cvsroot=cluster

"racadm" should be avoided.  The interface does not provide the feedback
necessary to guarantee that nodes have been properly fenced.  The telnet
interface is the preferred method for support DRAC hardware.  Fortunately, as
your link above shows, the fence_drac agent now supports the 1855 as of
Monday.


> The fence_drac agent out on the CVS should work for you. If you cant get it working, let me know, and ill see if I can dig up an 1855 in the lab.
> 
> Thanks, jacob
> 
> > -----Original Message-----
> > From: linux-cluster-bounces at redhat.com 
> > [mailto:linux-cluster-bounces at redhat.com] On Behalf Of 
> > "Sævaldur Arnar Gunnarsson [Hugsmiðjan]"
> > Sent: Wednesday, August 03, 2005 6:59 AM
> > To: linux-cluster at redhat.com
> > Subject: [Linux-cluster] Fencing agents
> > 
> > I'm implementing a shared storage between multiple (2 at the 
> > moment) Blade machines (Dell PowerEdge 1855) running RHEL4 ES 
> > connected to a EMC AX100 through FC.
> > 
> > The SAN has two FC ports so the need for a FC Switch has not 
> > yet come however we will add other Blades in the coming months.
> > The one thing I haven't got figured out with GFS and the 
> > Cluster-Suite is the whole idea about fencing.
> > 
> > We have a working setup using Centos rebuilds of the 
> > Cluster-Suite and GFS (http://rpm.karan.org/el4/csgfs/) which 
> > we are not planning to use in the final implementation where 
> > we plan to use the official GFS packages from Red Hat.
> > The fencing agents in that setup is manual fencing.
> > 
> > Both machines have the file system mounted and there appears 
> > to be no problems.
> > 
> > What does "automatic" fencing have to offer that the manual 
> > fencing lacks.
> > If we decide to buy the FC switch right away is it recomended 
> > that we buy one of the ones that have fencing agent available 
> > for the Cluster-Suite ?
> > 
> > If can't get our hands on supported FC switchs can we do 
> > fencing in another manner than throught a FC switch ?
> > 
> > 
> > 
> > 
> > -- 
> > Sævaldur Gunnarsson :: Hugsmiðjan
> > 
> > --
> > Linux-cluster mailing list
> > Linux-cluster at redhat.com
> > http://www.redhat.com/mailman/listinfo/linux-cluster
> > 
> 
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-- 
Adam Manthei  <amanthei at redhat.com>